SU1010353A1 - Automatically controlled shock absorber - Google Patents

Abstract

AUTOMATED SHOCK ABSORBER, containing elastic elements, one ends of which are fixed by a vibrating object, a spacer, an electromechanical dynamometer, through which the other ends are connected to the insulated 10M object, vibration exciter, installed on the spacer, sequentially connected summator, and an exciter, installed on the spacer, sequentially connected summator, and an exciter, installed on the spacer, sequentially connected summator, and an exciter, installed on the spacer, sequentially connected summator, and an exciter, installed on the spacer, sequentially connected summator, and an isolator object, vibration exciter, installed on the spacer, sequentially connected summator, and an adder 10M, vibration exciter, installed on the spacer, sequentially connected summator, summator, vibration exciter, installed on the spacer, sequentially connected summator, summator, vibration exciter, installed on the spacer, sequentially connected summator, summator, vibration exciter, installed on the spacer, sequentially connected summator, summator, vibration exciter, installed on the spacer, sequentially connected summator, summator; the output of which; connected to the vibration exciter, single-frequency units of forming the equalizing signal, the output of each of which is connected to the input of the adder, and the control inputs to the electromechanical dynamometer, characterized in that, in order to increase damping efficiency, it is equipped with a shaft-rotation sensor connected in series and a preamplifier, the output of which is connected to the input of one of the blocks of the form of a control signal, and multipliers whose inputs I are connected to the output of the preamplifier (L And the outputs - to the inputs of other blocks forming the control signal.

Description

 ate

00 The invention is intended for amortization of various objects in mechanical engineering. A shock absorber is known, which contains a vibrator and elastic elements, located between oscillating and vibrating objects, electrodynamometers and an amplifier, whose input is connected to a dynamometer, and the output - with a vibrator flj. The disadvantage of this shock absorber is determined by self-excitation of the vibration isolation system. The closest in technical essence and the achieved result to the proposed one is an automatically controlled shock absorber containing elastic elements; one ends of which are fixed on the collar {) lx object, spacer, electro-mechanical dynamometer, through KOTOp i. the other ends are connected to the isolating object, the vibration exciter mounted on the spacer, successively connected adder and power amplifier, the output of which is connected to the vibration exciter, one hour - the control signal generating units of the control signal, the output of each of which is connected to the input of the adder and the control inputs are connected to an electromechanical dynamometer f 2J. A disadvantage of the known device is the low damping efficiency due to the loss of stability of the electromechanical control system at certain frequencies. The aim of the invention is to increase the efficiency of depreciation. This goal is achieved by the fact that the shock absorber with automatic control is supplied with series-connected shaft speed sensor and preamplifier, the output of which is connected to the input of one of the control signal generating units, and multipliers whose inputs are connected to the output of the preamplifier, and the outputs to the inputs of other control signal generation units. The drawing schematically shows a shock absorber with automatic control. An automatic damping shock absorber contains elastic elements 1 and 2, one ends of which are fixed on the oscillating object 3, spacer 4, electromechanical dynamometer 5 through which ends are connected to the insulated object 6, vibration exciter 7, becoming on the spacer 4, successively connected adder. 8 and the power amplifier 9, the output of which is connected to the exciter 7, single-loop units 10, 11-12 P. The formation of the control signal. The number of control signal generating units is determined by the number of vibration components to be damped, each block includes. serially connected amplitude and phase regulators 13-16,14-17j 15П-18П, connected to the input of the adder 8, and optimizers 19, 20-21h, the inputs of which are connected to the dynamometer 5, and the outputs - to the inputs of the ammeter, 13,14- 15 And / and Phase 16,17-18 L regulators. The output of each of the control signal forming units is connected to the input of the adder 8, and the control inputs are connected to a dynamometer 5, sequentially connecting the shaft speed sensor 22 and the preamplifier 23, the output of which is connected to the input of one of the control signal generating units (for example , 10), multipliers 24, 25W1, the inputs of which are connected to the output of the preamplifier, and the outputs to the inputs of other control signal generating units. The shock absorber works as follows. The oscillating object 3, by deforming the elastic elements 1 and 2, creates a vibratory excitation of the insulated object (for example, the supporting foundation). The signal from the sensor of 22 revolutions of the oscillating object 3 (for example, a rotor mechanism) is fed through a preamplifier, 23 directly to the regulator 13 and through multipliers 24-25bi to the rotary tori 14 -1 5 and. The parameters of the shaft speed sensor 22, preamplifier 23, multipliers 24-25w, formation blocks 10,11-12M, adder 8, power amplifier 9 and vibrator of the catch 7 are chosen so that at the frequency of rotation (formation block 1O) and its harmonics 11--12 and formations, with some (usually average) values of the vibration frequencies, the components of the force developed by the & causative agent. 7, are equal in magnitude and opposite in direction to the respective components of the vibration force that acts on the insulated object b from the side of the elastic elements 1 and 2.

In this case, all the components of the vibration force, to which the control channels are tuned, are fully compensated by the forces of the vibration exciter 7, and the excitation of the insulated object 6 does not occur.

Optimizers are used to support the control channel in the best vibration force compensation mode. 19.20-21 and each of which has two independent channels of extreme control (amplitudes and phases of the control signal). Some channels serve to control the amplitude 13.14-15, and the other phase 16.17-18M. regulators; Each channel has a different search signal frequency, which allows simultaneous (parallel) search for the necessary amplitudes and phases of the control signals for all the video components.

In that banging, when the optimizers 19,2O-21h sighers have several corresponding different frequencies in their composition, the optimizers should be selective. I The inputs of the amplitude regulators 13,14-15 ", from one of the outputs of the optimizers 19,2O-21 i are given short-term search signals that change (for example, increase) the amplitudes of the control signals, and therefore, change the compensating forces developed vibration exciter 7. In this case, the total force acting on the spacer 4 from the side of elastic elements 1.2 and vibration exciter 7 is measured by a dynamometer 5 and S is compared with the same total yc or Qv before the search signal is applied. If, after the search signal was sent, the total force increased, the search signals decrease: the amplitude of the control signals. If the total force decreases, the search signals continue to increase the amplitudes of the signal waves until the total force is equal to the minimum.

5 At the same time, the search signals alternately reduce and increase the amplitude of the control signals, maintaining the total force near the minimum. The phase control channels work similarly

0 and independent of the amplitude control channels.

Due to the fact that in the shock absorber, control signals from an independent source (i.e., not associated with vibrations of oscillating and insulated objects), the system automatically compensates for vibratory 1x forces in an open loop and is therefore stable, which increases the efficiency of the DLA shock.

The use of the proposed shock absorber will reduce the dynamic loads on the insulated object, which will ultimately lead to an increase in the super-strength of its operation.

Claims (1)

SHOCK-ABSORBER WITH AUTOMATIC CONTROL, containing elastic elements, one ends of which are fixed on an oscillating object, a spacer, an electromechanical dynamometer. Through which the other ends are connected to an insulated object, a vibration carrier mounted on the spacer, a combiner and a power amplifier connected in series, the output of which is connected to the vibration exciter, single-frequency control signal generating units, the output of each of which is connected to the input of the adder, and the control inputs are connected to the electron chanical dynamometer, characterized in that, in order to increase the depreciation efficiency, it is equipped with a series-connected shaft speed sensor and a pre-amplifier, the output of which is connected to the input of one of the control signal generating units, and multipliers, the inputs of which Q are connected to the output of the pre-amplifier, and outputs - to the inputs of other control signal generating units.